<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <table border="1" width="500" height="300" cellspacing="0" cellpadding="50" align="left">
        <thead>
            <tr>
                <th>姓名</th>           
                <th>性别</th>           
                <th>年龄</th>           
            </tr>
        </thead>
        <!-- <tr>
            <td>姓名</td>           
            <td>性别</td>           
            <td>年龄</td>           
        </tr> -->
        <tbody>
            <tr>
                <td>张三</td>           
                <td rowspan="2">男</td>           
                <td>3</td>
            </tr>
            <tr>
                <td>李四</td>           
                <!-- <td>男</td>            -->
                <td>4</td>
            </tr>
            <tr>
                <td colspan="3">王五/女/5</td>           
                <!-- <td>女</td>            -->
                <!-- <td>5</td> -->
            </tr>
        </tbody>
    </table>
</body>
</html>